{% setvar book_path %}/reference/androidx/_book.yaml{% endsetvar %} {% include "_shared/_reference-head-tags.html" %}

ActivityLifecycleCallback

interface ActivityLifecycleCallback

Callback for monitoring activity lifecycle events. These callbacks are invoked on the main thread, so any long operations or violating the strict mode policies should be avoided.

Summary

Public methods
`abstract void`	`onActivityLifecycleChanged(Activity activity, Stage stage)` Called on the main thread after an activity has processed its lifecycle change event (for example onResume or onStart)

Public methods

onActivityLifecycleChanged

abstract void onActivityLifecycleChanged(Activity activity, Stage stage)

Called on the main thread after an activity has processed its lifecycle change event (for example onResume or onStart)

Parameters
`Activity activity`	The activity
`Stage stage`	its current stage.